Radio Observations of the Bowshock around the Runaway System VELA X-1 Ash, T. D. C. ; Ogley, R. N. ; Bell Burnell, S. J. ; Norton, A. J. ; Kaper, L. Abstract Publication: Neutron Stars and Pulsars: Thirty Years after the Discovery Pub Date: 1998 Bibcode: 1998nspt.conf..511A